Phaon

A young man greatly illtreated by Furor, and rescued by Sir
Guyon. He loved Claribel, but Philemon, his friend, persuaded him that
Claribel was unfaithful, and, to prove his words, told him to watch in
a given place. He saw what he thought was claribel holding an
assignation with what seemed to be a groom, and, rushing forth, met the
true Claribel, whom he slew on the spot. Being tried for the murder, it
came out that the groom was Philemon, and the supposed Claribel only
her lady's maid. He poisoned Philemon, and would have murdered the
handmaid, but she escaped, and while he pursued her he was attacked by
Furor. This tale is to expose the intemperance of revenge. (Spenser:
$$$ Qucene, ii. 4, 28.)